Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c9dadd66f3a0efd…

MALICIOUS

PDF

53.8 KB Created: 2020-08-16 12:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68c57f556afc9b5a959b03009c1885ff SHA-1: a6ea497a9f172a73d47bf81c91adf0e9a5958ca6 SHA-256: 4c9dadd66f3a0efd7e060724614a4fad4b12a9526e750b9345435ac3fca4a11c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, contains text related to a 'Chicago manual of style citation generator' and an embedded URL pointing to 'ttraff.ru', which is flagged as a malicious redirector. This suggests the document's primary purpose is to lure users to malicious infrastructure.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=chicago+manual+of+style+citation+generator
    • http://files.morrisadvohealth.com/uploads/1/3/0/7/130776324/lamofoji-jipibe-buxinubefopes-geluk.pdf
    • http://domapase.aasca.org/uploads/1/3/1/3/131383483/podurojigi-doxiwate.pdf
    • https://cdn.shopify.com/s/files/1/0429/0979/4463/files/nakosiva.pdf
    • https://cdn.shopify.com/s/files/1/0437/0225/5770/files/askeb_abortus_inkomplit.pdf
    • https://cdn.shopify.com/s/files/1/0431/0404/3170/files/48981920101.pdf
    • https://cdn.shopify.com/s/files/1/0430/7822/1973/files/tunoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/0485/4426/files/92628626636.pdf
    • https://cdn.shopify.com/s/files/1/0437/1608/3877/files/3542571544.pdf
    • https://cdn.shopify.com/s/files/1/0432/8806/8254/files/xepomenaloveluwizin.pdf
    • https://cdn.shopify.com/s/files/1/0429/7408/5279/files/32268400945.pdf
    • https://cdn.shopify.com/s/files/1/0437/8768/1952/files/fukefigajemu.pdf
    • https://cdn.shopify.com/s/files/1/0438/8506/8456/files/vernier_caliper_least_count.pdf
    • https://cdn.shopify.com/s/files/1/0434/9476/8792/files/nagetog.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000950e.bin
7eb78bf8ec5d1fab7dc05092c7c0af1d48041d813158109252f1974dbcf7124b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x950E 5300 bytes
font_01_sfnt_off0000a6f9.bin
6886776eb55672c37d4aef9d58c408777c2dd3cd4b27a5f11db46eaf6bd9efd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6F9 10236 bytes

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